Hello List,
Just to clarify: I thought that the "total white matter volume" statistic that is output as part of 'mris_anatomical_stats' is incorrect and not to be used. Rather, I thought 'mris_wm_volume' was to be used instead...
Also, while I'm posting on this issue, could someone please comment on how 'mris_wm_volume' computes its value? I thought that perhaps the output of 'mris_wm_volume' would be the same as that obtained by running 'mris_volume' on the ?h.white surface and then subtracting the volume of (lateral ventricle + caudate + putamen + pallidum + thalamus-proper) (obtained from the aseg), but the numbers don't match, and the relatively long processing time of 'mris_wm_volume' relative to 'mris_volume' suggests to me that something more complex is going on.
thanks, Mike Harms
On Tue, 2007-05-01 at 10:04 -0400, Bruce Fischl wrote:
On Tue, 1 May 2007, deepa preeti wrote:
Hi all,
I am a Freesurfer beginner and trying to do cortical surface analysis. I wanted to have whitematter, gray volume and avg.thickness for each hemisphere. So when I run mris_anatomical_stats -t thickness <subject> lh
I get the following data:
total white matter volume = 729800 mm^3 total surface area = 90850 mm^2 total gray matter volume = 181205 mm^3 average cortical thickness = 1.971 mm +- 0.739 mm average integrated rectified mean curvature = 0.129 average integrated rectified Gaussian curvature = 0.039 folding index = 1574.464 intrinsic curvature index = 204.376
Please correct me if I have this wrong.
total whitematter volume ---> is of the total brain
this is the volume of the cerebral white matter
total surface area ---------> what does it represent ?
the surface area of whatever surface you specified (default is lh.white)
cheers, Bruce
I am bit confused here.
Thanks, Deepa Ramasamy.
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